Flying object similar to blimp shaped like rounded football, illuminated from within.

Driving west, saw illuminated off white object. Seemed to be illuminated from within. Similar to Rounded football shape, traveling NNW estimated speed 50+ MPH. Strobe like lights on top and bottom. Disappeared behind trees. Seemed to be gliding. Not like a blimp, more like some image on computer. Never saw anything like it before. In car, unable to detect sound. Very distinct and clear, not just a light, was real something.